Kyrie Eleison
From BiblePortal Wikipedia
Webster's Dictionary [1]
(1): The name given to the response to the Commandments, in the service of the Church of England and of the Protestant Episcopal Church.
(2): Greek words, meaning "Lord, have mercy upon us," used in the Mass, the breviary offices, the litany of the saints, etc.
The Nuttall Encyclopedia [2]
Means "Lord have mercy upon us," and with
quot;Christ have mercy upon us," occurs in all Greek liturgies, in the Roman Mass, and in the English Prayer Book, where it forms the "lesser litany."